Today is the holiday of Easter, it is also Passover. Some search engines have special logos and themes for the day, while others don't. Google, Yahoo & AOL are all missing special logos for Easter or Passover. Microsoft's Live.com, Ask.com, DogPile and a few others do have special Easter themes and logos. Here they are:
Microsoft's Live.com theme:
Forum discussion at Cre8asite Forums.